I am learning about social media analysis. I am aware that we can extract the data from twitter using hashtags and API. Ex; If I use #covid19, I will get all tweets that contain this hashtag for the duration that I specify.

Similarly, let's say I visit a public Facebook page https://www.facebook.com/A123

Will I be able to extract only the posts which contain the term covid in their text (from all of their posts) using my API credentials?

Is it possible? I don't like to extract all the posts from the page A123. However, I only wish to extract only the posts which contain the term covid in their text (from all of their posts)

Can you help me on how can it be done?

Any tutorial/tools available to extract this info?